Machine for mixing road material and the like



T. J. BARRETT MACHINE FOR MIXING ROAD MATERIAL. AND THE LIKE March 15 1927. 1,621,099

Original Filed Nov. l2, 1921 2 Sheets-Sheet 1 March 15, 1927'.

T. J. BARRETT MACHINE FOR MIXING ROAD MATE'RAlJ AND THE LINE Original Filed Nov. 2. 1921 2 Sheets-Sheeil 2 UNITED STA `with an asphaltic or Patented Mar.` 15,l 1927,.

T E S A1,621,099 PATENT OFFICE.

THOMASi J'. BRRETT, OF BORDENTOWN, NEW JERSEY.

MACHINE FOR MIXIN ROAD MATERAL AND LIKE.

Application led November 2,

`My invention relates to apparatus employed for the mixing of road-building material where it is desired to thoroughly incorporate the mineral ingredients thereof bituminous binding material, with or without the` addition of a special solvent for such binding material, which in some instances, may be burnt out when the material is placed upon the roadbed.' My invention'also relates to an improved process or method of treatment, which may be carried out in my improved ap aratus. i

ne object. of my invention is to provide a simple and eiicient mixing machine, which may be power driven, wherein I can eifect rapid mixing of the road material and at the same time completely coat each particle of the mineral aggregate with the desired binding agent. f

A ,further object of my invention is to mix the material in such manner that it will be elevated into contact with the air in order that the mass may be thoroughly aerated; the air mixed with the same assisting in the gasifying or vaporizing of the solvent when employed and rendering thelatter readily susceptible of being burnt out should such method of procedure be carried out in the utilization of the material in the formation of a road.

i A further object of my invention is to provide a special form of mixing blade, which may be rightand left-handed, and designed to lift and agitate the materia-l being mixed in order that all portions of the same may be brought into contact. with the air; such mixing blades not only raising the i -material during the mixing Aoperation but also moving the same laterally `from end to v end of the machine.

A further object of my invention is 'to` vLaffvslo 'arrange said mixing` blades that the '45 material being mixed will' be moved or car- .toward the center of the same urin the ried from the ends of the mixin chamber discharge of such material from the mixing "chambe r. A further `object of my invention is to provide .a "structure wherein the agitating and mixing blades will be so disposed and of' such a character as to completely clean the Isurface of the mixing chamber so that the mixture may be comdischarged. a still further object of my invention 'from the engine may be 1921, Serial ,No. 512,394. Renewed November 21, 1925.

invention.

Fig. 2. is a cross sectional view, on the line II-II, Fig. l.

Fig. 3, is a side elevation of the mixing chamber, and.4

Figs. 4, 5 and 6, are views of the special form of stirring or mixing blade which I employ in my improved mixing machine; Figs. 5 and 6, being sectional views. on the lines V-V and VI-.VL Fig. 4, respectively.

My improved mixing chamber is preferably mounted upon a portable structure, which may also -carry driving means. Such arrangement is not essential however, and the mixing blades may be hand-driven if desired. As illustrated in the drawings herewith, my improved apparatus ma comprise a tank or receptacle 1 moun upon a suitable frame work or lody 2, having wheels 3. y This `body may alsol carry a prime mover,shown in dotted lines, vwhich may be any ordinary type of internal combustion engine, indicated at 4. Through the medium of suitable gearing indicated at 5, 6, 7 and 8, and a clutch element9, a shaft 10, passing through the mixing chamber 1, may be driven, and .with it the several mixing blades, as hereinafter described. 4As indicated,this shaft may be hand-driven, with or `without. the interposition 'of gearing, by attaching a crank handle thereto. .l

A suitable mixing chamber- Isprcvidedby the tank 1, and the shaft 10 the s ame may be journaled in bearings 11 and 12, carried by suitable supports 13 and 14, mounted on the body Ifdesired, the wall of the tank forming the mixingchamber may be hollow` providing the space 15 and, when employed, the products of combustion and gases exhausting delivered to the space provided by said hollow wall so as to passing througl of the apparatus.

' portions 17",

v l thereof and` insuring f -v the material during `with respect to said arms.

`rotation' and carry it upwardly outward Vand toward the center of the ix'rng ber; the character and agit the provide some heat during the mixing operation.

The` mixing chamber is preferabl .semicircular in cross section, and the s aft 10 malyl7 carry at each end, adjacent to the end wa s of the chamber, a air of cutting and scraping blades 16, which I have termed plows; the function of which Ais to scrape from the curved wall of the chamber, as well as said end walls, the material within lthe chamber, in addition to thoroughly agitating the same, and said plow blades are so shaped and disposed as to have a tendency to' move the material agitated and scraped from the'end walls of the same toward the center of the mixing chamber. Intermediate the sets of plow blades at the ends of the mixing chamber, are a series of other mixing blades of a special type, indicated at 17, each of said blades being adjustably carried by an arm 18, secured to the shaft 10, by clamp members 19. The arms may have toothed seats 20 for engagement by similarly toothed portions 21, of the blades; said arms being slotted at 22 for the passage of retaining bolts 23, and permitting adjustment of the blades These blades 17 are of a special shape and character as clearly indicated in Figs. 4, 5 and 6; having an outline substantially rectangular at one end comprising the discharge edge 17 a, and the side edges 17h and 17, and being semicircularly curved at the o posite end as indicated at 17d; the semicircularly curved ,portion projecting laterally at one side of the blade beyond the plane of the edge 17b and joined to-the ed e 17 by a substantially straight portion 1% diagonally disposed with respect tothe ed e 17". These blades are also rightand .le thanded, as clearly indicated in Figure 1.Q In addition, each blade is hollowed out in planes substantially at right angles to each other in substantially bowl-sha ed form, whereby a discontinuous raised e ge is provided around such blade made up of the 17, 17d and 17. yThis structure is, in eiect, a bowl-shaped 'scoopingblade with a free discharge end, and itsv function'- is to scoop up cham- 4 blade permitting the-nia erial pic ed up thereby to'drop laterally from the lateral extension of the same when said blade is in the uppermost position, this` lateral displacement of the material insuring movement 'of the same within the mixing chamber longitudinally will always be engaging fresh portions of the rotative movement.

The blades lift the material from the bottom of the chamber and raise ciently close the material durinIg/outirough the same y able receptacle such further that each blade lowed blades is such that the material willV not only be lifted thereby, and approximately to the height attained by such blades when rotating, but such material in dropping from the saine will be carried laterally and moved from end to end of the mixing l chamber.

A plurality of these blades are disposed on opposite sides of the center of the mixing chamber, in the present instance in sets of three, with a blade centrally disposed, so that while the blades at one `end tend to move the material in one direction, the other blades tend to move it in the opposite direction, both movements being toward the center of the mixing chamber. As the material being mixed will naturally gravitate to the bottom of the chamber duriig su cient material present lat the ends of the mixing AtD the side of the mixing chamber, I may provide a discharge opening 25, normally closed by a door or gate 26, which preferably follows the contour of the mixing chamber, and fianges 27, may be pro-` vided to guide the door so that it may be readily raised and lowered as desired. These anges may carry anti-friction rollers 28, to assist the movement of such door or gate.

It will be at once apparentthat by having blades which tend to throw the material toward the center ofthe mixing chamber land. at the same time lift it, such material 'may be discharged from the. mixing; chamber as soony as ,the door or ate is opened, ,the` lower edge of the/opening being suftn-the/bottom oli the chamber to permit/the blades to elevate the material other collector, by which it` may be carried to any desired point.

In order that the OP hinged on a pivot pin 31, the connection between these parts being such as to permit such lever a certain amount of lateral motion in addition to the up and down motion that will be imparted the door or gate. The end 32, ofsaid lever, ma be connected to a link 33 the vopposite en of which link is connected at 34, to the bottom of the door. By means .door or gate may-be fofA such erated, I may provide a lever 30,1oose1y.

for delivery to a suitas a wheel-barrow,or p

to it in order to open' arrangement, the door may be readil raised or lowered in the guide anges 2 carried by the side of the mixing chamber.

While I have referred to my improved mixing chamber as intended for mixing road-building material and for coating the mineral ingredients thereof with an asphal tic or bituminous binding agent, it may be margin around the rest of its perimeter.

2. A revolving mixing blade for a horizontal mixing chamber, comprising'a bowlshaped body with a substantially straight, open scraping and discharge margin for cooperating with the mixing chamber periphery.

3. As a new article of manufacture, a mixing blade comprising a hollowed substantially scoop-shaped body having a substantially rectangular portion with a straight edge at one end, and curved at the opposite end to provide a bowl-shaped lateral extension projecting to oneV side of the substantially rectangular portion, with a discontinuous marginal edge extending substantially all around the same, and terminating at opposite ends of said straight ed e.

As a new article of manufacture, a mixing blade comprising a hcllowed body substantially rectangular at one end and curved at the opposite end, with a discontinuous marginal edge extending substantially around the same to a straight edge at its rectangular end; said blade being shaped to piek up material, hold it by its marginal edge and discharge itl from the straight free edge thereof.

5. As a new article of manufacture, a mixing'blade comprising a hollowedy body substantially rectangular at one end and curved at its opposite end with a discontinuous edge curving up from the body of the same to a straight edge at its rectangular end, with a part of said curved portion extending laterally with respect to the rectangular portion.

6. In a mixing machine, the combination of a shaft, an arm carried thereby, 4a seat at the outer end of said arm, a scoop-shaped blade with a discontinuous raised edge having a seat engaging the seat at the outer end of the arm; the latter being slotted, and a bolt passing through said blade and the slot of the arm and serving to hold these parts in ad'usted positions; said blade having its raise edge portion disposed adjacent the shaft upon which its supporting arm is mounted.

f 7.' In a mixing machine, the combination of a horizontal shaft, an arm carried thereby and having a seat adjacent its end, a scoopshaped blade having a hollowed body with a discontinuous raised edge and a bowlshaped lateral extension projecting towardv the longitudinal center of the mixing chamber adjacent the axis of rotation; said blade having a seat engaging the seat of the arm and the varm being slotted, and a bolt passing through said' blade and the slot of the arm, and'serving to hold these parts in adjusted position.

In witness whereof I have signed this specification.

THOMAS J. BARRETT. 

